code: def __init__(self):
      super().__init__()
      self.dataset_name = "masked_q_vqa2"
      self.dataset_class = MaskedQVQA2Dataset
  
file_path: mmf/mmf/datasets/builders/vqa2/masked_q_vqa2_builder.py
imports: import os
  import warnings
  from mmf.common.registry import registry
  from mmf.datasets.builders.vqa2.builder import VQA2Builder
  from mmf.datasets.builders.vqa2.masked_q_vqa2_dataset import MaskedQVQA2Dataset
  from mmf.datasets.concat_dataset import MMFConcatDataset
label_desc: Use image node_id 1 to create a new MaskedQVQA2Builder object from inherited base classes: VQA2Builder with example: obj = MaskedQVQA2Builder()